AAR Corp. provides products and services to commercial aviation, government, and defense markets worldwide. The Parts Supply segment leases and sells aircraft components and replacement parts. The Repair & Engineering segment provides airframe maintenance services, such as airframe inspection, painting, line maintenance, airframe modification, structural repair, avionics service and installation, exterior and interior refurbishment, and engineering and support services; component repair services comprising maintenance, repair, and overhaul (MRO) services, engine and airframe accessories, and interior refurbishment; and landing gear overhaul services, including repair services on wheels and brakes. This segment also develops specific aircraft components and parts; and designs proprietary designated engineering representative repairs. The Integrated Solutions segment engages in the fleet management and operation of customer-owned aircraft; provision of supply chain logistics services, such as material planning, sourcing, logistics, information and program management, and parts and component repair and overhaul services; and flight hour component inventory and repair services. In addition, the segment provides integrated software solutions comprising Trax, a cloud-based electronic enterprise resource platform, as well as a suite of paperless mobility apps for automating MRO workflows. The Expeditionary Services segment designs, manufactures, and repairs transportation pallets; and containers and shelters for military and humanitarian tactical deployment activities, including armories, supply and parts storage, refrigeration systems, tactical operation centers, briefing rooms, laundry and kitchen facilities, water treatment, and sleeping quarters, as well as engages in provision of engineering, design, and system integration services for specialized command and control systems. AAR Corp. was founded in 1951 and is headquartered in Wood Dale, Illinois.